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Research And Development On Advanced Graphite Materials. Volume XXXVIII - Development Of An Improved Large-Diameter Ultrafine-Grain Graphite

Report Number: WADD TR 61-72 Volume 38
Author: Howard, V
Author: Racicot, R. L.
Corporate Author: Advanced Materials Laboratory, National Carbon Company
Laboratory: Air Force Materials Laboratory
Date of Publication: 1964-04
Pages: 28
Contract: AF 33(616)-6915
Project: 7350
Task: 735002
AD Number: AD0601406

The report describes the development, fabrication processes and physical properties of grade RVD graphite (formerly RT-0008), 18-inch diameter by 15-inch length, and an attempted scale-up of this grade to 33-inch diameter. Grade RVD graphite, an extra-fine-grain material formed by pressure curing, is nominally characterized by a density of 1.87 to 1.89 g/cc and flexural strengths of 4700 lbs/in2 with the grain and 310 lbs/in2 across the grain. Nozzles made from RVD graphite, tested in a subscale rocket motor, exhibit a low erosion rate and high thermal shock resistance.

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